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DEBT (Tables) | 12 Months Ended
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Dec. 31, 2018
Debt Disclosure [Abstract] |
Schedule of composition of the Company's debt and financing obligations | The total debt composition of the 2022 Notes is as follows (in thousands):
| December 31,
| 2018 |  | 2017
2.375% convertible senior notes due 2022 | $ | 345,000 |  |  | $ | 345,000 |
Deferred financing costs | (5,850 | ) |  | (7,482 | )
Discount on debt | (48,558 | ) |  | (61,345 | )
Total debt, net of debt discount and deferred financing costs | $ | 290,592 |  |  | $ | 276,173 |
Schedule of total interest expense recognized related to the Notes | The following table sets forth the total interest expense recognized in the periods presented (dollar amounts in thousands):
| Year Ended December 31,
| 2018 |  | 2017 |  | 2016
Contractual interest expense | $ | 8,205 |  |  | $ | 7,344 |  |  | $ | 3,852 |
Amortization of debt issuance costs | 1,634 |  |  | 1,381 |  |  | 612 |
Amortization of debt discount | 12,799 |  |  | 10,423 |  |  | 4,088 |
Capitalized interest and other (Note 6) | (689 | ) |  | (1,101 | ) |  | (1,491 | )
Total | $ | 21,949 |  |  | $ | 18,047 |  |  | $ | 7,061 |
Effective interest rate on convertible senior notes | 7.81 | % |  | 7.77 | % |  | 7.22 | %

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